package class01;

public class hello {
    public static void main(String[] args) {
        int a = 0;
        System.out.println("hello,world");
        System.out.println(a);
        System.out.println(Integer.MAX_VALUE);
        System.out.println(Integer.MIN_VALUE);
        System.out.println("===============");
        long b = 10;
        System.out.println(b);
        System.out.println(Long.MAX_VALUE);
        System.out.println(Long.MIN_VALUE);

        byte aa=-128;
        System.out.println(aa);
    }
}
